Quintuplets in Hookpad?!

I recently saw a Tab with what appears to be a quintuplet. How did people do this?

Are you talking about the ornament in bar 3? I’m pretty sure it’s three sixteenth note triplets sandwiched by two regular sixteenth notes. They probably used a glitch to achieve this though since Hookpad doesn’t allow for anything smaller than sixteenth notes.
Triplets are currently the only tuplets possible in Hookpad. Quintuplets have already been requested before and the answer was the following: